<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  <title>hello测试</title>
</head>
<body>
<form action="/do-login" method="post">
  <input type="text" name="username">
  <input type="password" name="password">
  <button type="submit">登录</button>
</form>